| 1 |
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| 2 |
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| 3 | #ifndef __ASM_CSKY_BITOPS_H
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| 4 | #define __ASM_CSKY_BITOPS_H
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| 5 |
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| 6 | #include <linux/compiler.h>
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| 7 | #include <asm/barrier.h>
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| 8 |
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| 9 | |
| 10 | * asm-generic/bitops/ffs.h
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| 11 |
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| 12 | static inline __attribute_const__ int ffs(int x)
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| 13 | {
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| 14 | if (!x)
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| 15 | return 0;
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| 16 |
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| 17 | asm volatile (
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| 18 | "brev %0\n"
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| 19 | "ff1 %0\n"
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| 20 | "addi %0, 1\n"
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| 21 | : "=&r"(x)
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| 22 | : "0"(x));
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| 23 | return x;
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| 24 | }
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| 25 |
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| 26 | |
| 27 | * asm-generic/bitops/__ffs.h
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| 28 |
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| 29 | static __always_inline __attribute_const__ unsigned long __ffs(unsigned long x)
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| 30 | {
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| 31 | asm volatile (
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| 32 | "brev %0\n"
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| 33 | "ff1 %0\n"
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| 34 | : "=&r"(x)
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| 35 | : "0"(x));
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| 36 | return x;
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| 37 | }
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| 38 |
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| 39 | |
| 40 | * asm-generic/bitops/fls.h
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| 41 |
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| 42 | static __always_inline __attribute_const__ int fls(unsigned int x)
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| 43 | {
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| 44 | asm volatile(
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| 45 | "ff1 %0\n"
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| 46 | : "=&r"(x)
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| 47 | : "0"(x));
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| 48 |
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| 49 | return (32 - x);
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| 50 | }
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| 51 |
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| 52 | |
| 53 | * asm-generic/bitops/__fls.h
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| 54 |
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| 55 | static __always_inline __attribute_const__ unsigned long __fls(unsigned long x)
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| 56 | {
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| 57 | return fls(x) - 1;
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| 58 | }
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| 59 |
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| 60 | #include <asm-generic/bitops/ffz.h>
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| 61 | #include <asm-generic/bitops/fls64.h>
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| 62 |
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| 63 | #ifndef _LINUX_BITOPS_H
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| 64 | #error only <linux/bitops.h> can be included directly
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| 65 | #endif
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| 66 |
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| 67 | #include <asm-generic/bitops/sched.h>
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| 68 | #include <asm-generic/bitops/hweight.h>
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| 69 | #include <asm-generic/bitops/lock.h>
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| 70 | #include <asm-generic/bitops/atomic.h>
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| 71 |
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| 72 | |
| 73 | * bug fix, why only could use atomic!!!!
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| 74 |
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| 75 | #include <asm-generic/bitops/non-atomic.h>
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| 76 |
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| 77 | #include <asm-generic/bitops/le.h>
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| 78 | #include <asm-generic/bitops/ext2-atomic.h>
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| 79 | #endif
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